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Lady of the Lake Complex

Occurrence in Madison county in Montana, United States with commodities Gold, Platinum, Palladium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10048652
MRDS ID MP00263
Record type Site
Current site name Lady of the Lake Complex

Geographic coordinates

Geographic coordinates: -111.96836, 45.5149 (WGS84)
Elevation 3048
Location accuracy 100(meters)
Relative position ABOUT 1 MI EAST OF BRANHAM LAKES, Acc Accurate Within Complex. Location Given Is Summit Of Lady Of The Lake Peak

Site location context

Political divisions (FIPS codes)

Madison(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Potosi Peak(quadrangle 1:24,000 scale)

Bozeman(quadrangle 1:100,000 scale)

Bozeman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Madison(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Montana Madison

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 004S 003W 03,04 W2 (03); E2 OF SE(04) Montana

Comments on the location information

  • IN BEAVERHEAD NATIONAL FOREST

Commodities

Commodity Importance
Gold Primary
Platinum Critical Primary
Palladium Critical Primary

Analytical data

Result AU+PT+PD=1.3 PPM MAX. IN SULFIDE RICH ZONES

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name Lady Of The Lake Complex
    Rock description Lady Of The Lake Complex
    Stratigraphic age (youngest) Mesoproterozoic
    Stratigraphic age (youngest) Mesoproterozoic

Nearby scientific data

(1) -111.96836, 45.5149
ListMap

Economic information

Ore body information

  • General form UNKNOWN

Controls for ore emplacement

  • Immiscible Liquid

Comments on the geologic information

  • COMMON PB COMPOSITION OF SPHENE SUGGESTS 1,000 MA AGE. GEOLOGIC CONSTRAINTS ARE BROAD; COMPLEX INTRUDES 2.5 GA GNEISSES AND IS INTRUDED BY CRET TOBACCO ROOT BATHOLITH. COMPLEX IS COMPOSED OF NORITE, ANORTHOSITIC ROCKS, OXIDE CUMULATES, ORTHOPYROXENE COMULATES, AND GRANOPHYRE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Comments on development

  • DISCOVERED DURING SCIENTIFIC STUDY. ECONOMIC FEASABILITY OF AREA HAS NOT BEEN STUDIED

Reference information

Bibliographic references

  • Deposit

    HORN, L., MUELLER, P., AND HEATHERINGTON, A., 1992, GEOCHEMISTRY OF A LAYERED MAFIC INTRUSION: THE LADY OF THE LAKE COMPLEX, TOBACCO ROOT MOUNTAINS, SOUTHWESTERN MONTANA [ABS.]: GEOLOGICAL SOCIETY OF AMERICA ABSTRACTS WITH PROGRAMS, V. XX, P. A262.

  • Deposit

    HORN, L., COYNER, S., MUELLER, P., AND HEATHERINGTON, A., 1991, THE LADY OF THE LAKE COMPLEX: A NEWLY DISCOVERED, LAYERED, MAFIC INTRUSION, TOBACCO ROOT MOUNTAINS, SW MONTANA [ ABS.]: GEOLOGICAL SOCIETY OF AMERICA ABSTRACTS WITH PROGRAMS, V. XX, P. A329.

General comments

Subject category Comment text
Deposit UNPUBLISHED MODEL NAME: MAGMATIC SEGREGATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-93 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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